This standard was last reviewed and confirmed in 2019. Therefore this version remains current.
Abstract Preview
On separate test portions the following determinations are carried out: measurement of the apparent pH in methanolic medium; determination of the water content; determination of the distribution of primary, secondary and tertiary amines contents; determination of oxyethylene groups content; determination of sulphated ash. Furthermore an aqueous or methanolic solution of a test portion is prepared and the free polyethylene glycols are isolated. On the separated polyethylene glycols the absence of nitrogen is verified and their relative molecular mass is determined.
General information
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Status : PublishedPublication date : 1981-04
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Edition : 1Number of pages : 7
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- ICS :
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Surface active agents
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| Format | Language | |
|---|---|---|
| Paper |
- CHF58
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